2.9 L: Protection Functions
470 YASKAWA TOEPYAIGA8002B GA800 Drive Programming
The drive detects overtorque when the output frequency aligns with the frequency reference. Detection does not occur
during acceleration/deceleration. The drive outputs an oL4 [Overtorque Detection 2] and operation stops.
4 : oL @ RUN - Fault
When the Run command is enabled, the drive constantly detects overtorque. The drive outputs an oL4 and operation
stops.
5 : UL @ Speed Agree - Alarm only
The drive detects undertorque when the output frequency aligns with the frequency reference. Detection does not
occur during acceleration/deceleration. The drive outputs a UL4 [Undertorque Detection 2] and operation continues.
6 : UL @ RUN - Alarm only
When the Run command is enabled, the drive constantly detects undertorque. The drive outputs a UL4 and operation
continues.
7 : UL @ Speed Agree - Fault
The drive detects undertorque when the output frequency aligns with the frequency reference. Detection does not
occur during acceleration/deceleration. The drive outputs a UL4 and operation stops.
8 : UL @ RUN - Fault
When the Run command is enabled, the drive constantly detects undertorque. The drive outputs a UL4 and operation
stops
■ L6-05: Torque Detection Level 2
No.
(Hex.)
Name Description
Default
(Range)
L6-05
(04A5)
Torque Detection Level 2
Sets the detection level for Overtorque/Undertorque Detection 2. In V/f control, drive rated output
current = 100% value. In vector control, motor rated torque = 100% value.
150%
(0 - 300%)
Note:
Overtorque/Undertorque Detection 2 cannot set the detection level for the analog input terminal.
■ L6-06: Torque Detection Time 2
No.
(Hex.)
Name Description
Default
(Range)
L6-06
(04A6)
Torque Detection Time 2
Sets the detection time for Overtorque/Undertorque Detection 2.
0.1 s
(0.0 - 10.0 s)
■ L6-07: Torque Detection Filter Time
No.
(Hex.)
Name Description
Default
(Range)
L6-07
(04E5)
Torque Detection Filter Time
Sets the time constant for a primary filter to the torque reference or to the output current used to
detect overtorque/undertorque.
0 ms
(0 - 1000 ms)
■ L6-08: Mechanical Fatigue Detect Select
No.
(Hex.)
Name Description
Default
(Range)
L6-08
(0468)
Mechanical Fatigue Detect
Select
Sets the speed where the drive detects mechanical deterioration and how the drive operates (operation
status) after detection.
0
(0 - 8)
The drive detects mechanical weakening through overtorque or undertorque as specified by the conditions set in L6-
08 to L6-11 [Mechanical Deterioration Detection Settings Parameters]. Set overtorque/undertorque detection
conditions in L6-01 to L6-03 [Torque Detection 1 Settings Parameters]. The drive disables the operation selection set
in L6-01 [Torque Detection Selection 1].
0 : Disabled
The drive does not detect mechanical weakening.
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